. ♪ ♪ this is a stunning work of technology. ♪ this is the 2013 lexus es and the first-ever es hybrid. this is the pursuit of perfection. are proven to be effective pain relievers. tylenol works by blocking pain signals to your brain. bayer advanced aspirin blocks pain at the site. try the power >>> he was controlled by fbi like for five, three, five years. they knew what my son was doing. they knew what actions and what the sites on the internet he was going. they used to come home, they used to come and talk to me. they used to tell me that, you know, that they are controlling his -- they were telling me that he is really a terrorist leader and they are afraid of him. >> that is tamerlan tsarnaev's mother saying the fbi monitored him forself years essentially, his every move. is that true and if so why? joining me is clark kent irvin. with a big welcome to you, so glad you're here, because as we listen to what the mom is saying, do you believe it or do you think she may have mistaken the world controlled for being observed by or watched by? >> i think that's exactly right, alex. i'm